Sawmill-dog



2 SheetsSheet 1.

(No Model.)

V; MARTIN 8c M. HANNA;

SAWMILL DOG.

Patented Oct. 11., 1892.

2 Sheets.-Sh eet 2. V. MARTIN 8v M. HANNA. SAWMILL DOG.

Patented Oct. 11, 1892.

(No Model.)

. I so UNITED STATES PATENT -OFFICE.

VANBURON MARTIN AND MICHAEL HANNA, OF CLINTON, MISSOURI.

SAWMILL-DOG.

SPECIFICATION forming part of Letters Patent No. 484,332, dated October 11, 1892.

Application filed April 30, 1892.

T0 aZZ whom it may concern:

Be it known that we, VANBURON MARTIN and MICHAEL HANNA. citizens of the United States, residing at Clinton, in the county of Henry and State of Missouri, have invented a new and useful Sawmill-Dog, of which the following is a specification. This invention relates to sawmill-dogs; and it has for its object to provide certain improvements in sawmill-dogs which render the same more easily and rapidly operated than the dogs now in use, and a dog which will hold the timber in such a manner that there is less waste of lumber than is usual; and to this end the invention is particularly designed in the nature of an improvement over Letters Patent No. 457,971. I

With these and many other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a perspective view of a sawmill-dog constructed in accordance with the present invention. Fig. 2 is a rear elevation of the same. Fig. 3 is a vertical longitudinal sectional view of the dog. Fig. 4 is a transverse sectional view on the line 4 4 of Fig. 3. Fig. 5 is a detail plan View of the upper portion of the dog.

Referring to the accompanying drawings, A represents an ordinary sawmill-carriage frame, upon which is mounted the main upupright B,secured to said frame in the ordinary manner and adapted to be moved thereon, as usual. The said upright B is of the requisite height for the accommodation of the various thicknesses of timber and is provided its entire length in one face thereof with the vertical groove or channel 0, within which is fitted to slide the vertically-moving springactuated rack-bar D. The said rack-bar D, moving within the face channel or groove of the upright B, is provided with or carries at its extreme lower end the lower dog-head E, provided with the side guide-flanges e, embracing the sides of the upright and providing means for holding the lower head to slide over the upright, while at the same time serving to hold the rack-bar within its channel or Serial No. 431,281. (No model.)

groove. The said lower head E is further provided with the transverse squared opening F, extending transversely through the same, and with the projecting foot-flange F, upon which the foot of the operator is placed to force the lower dog-head and the rack-bar connected therewith down totheir limit of travel before throwing the same into engagement with the timber. The said lower head E is provided on one side thereof, back of one end of the transverse opening therethrough, with the bearing-lug G, receiving the-revolving bearing-sleeve g, working therethrough, and provided with a squared perforation g, which receives the squared setting-shaft H, the upper end of which is journaled in the laterally-extending bearing-plate'h, from which extends the arm h, secured to the rear upper end of the vertical upright. Sliding laterally through the transverse opening F in the lower head E is the lower dog I, having an outer depressed or downturned end 11, provided with the main upwardly-pointed dog-tooth t" and the outer supplemental tip or tooth '5 also pointing upwardly and designed for engaging a board in conjunction with the'upper dog, to be described, as set forth in the patent referred to. The said sliding dog I is further provided with a rear toothed face 11 which meshes with the pinion J, mounted upon the dog-setting shaft H, beneath the bearing-lug G, and provides means for moving or setting the lower dog to or from the upright, according to the timber being grasped.

Sliding upon the upright 13, over the sliding rack D, and'above the lower doghead carried thereby is the upper sliding dog-head K, provided with the central face-opening is, from each side of which project the forwardlyextending ears or lugs is, between which is mounted the circular lever-head L at one end of the weighted lever-handle Z. The said lever-head L is provided with a partly-toothed face Z, which meshes with the teeth of the rack-bar D,and is further provided with the circular guide-flanges Z on each side of and extending back of the teeth in said head and adapted to straddle the teeth of the rack. Said flanges not only serve as guides to keep the lever-head straight over the rack-bar, but also allow the said head to ICO be easily ungeared from the rackbar by straightening the lever up when it is desired to drop the upper dog-head. The said upper dog-head K is also provided with the side guide-flanges k which embrace the sides of the upright and hold the upper head in posi tion to allow the same to slide over the up: right. The said upper head is also provided beneath the face-opening 70 therein with the transverse squared opening M, extending transversely through the same in front of the rack-bar and designed to receive the upper dog N, provided with the downwardly-disposed engaging-point a, pointing toward the engaging-points of the lower sliding dog-head. The said upper dog is provided with the rear toothed face m, which meshes withthe pinion J, mounted upon thedog-setting shaft H, directly beneath the bearing-lug O, extending laterally from one side of the upper sliding dog-head and accommodating the revolving bearing-sleeve g working therein and receiving the revolving shaft I-I, similar to the lower bearing-sleeve gin the bearing-lug of the lower sliding head, so as to allow said sliding heads to slide up and down the squared setting-shaft and carry the pinions therewith, while at the same time allowing.

, of notches 7L2 to hold the sliding dogs in any position in which the same are set.

The upright B is provided with the rear wardly-extendin g lugs O, to which or between which is secured the fixed rod P, accommodating the coiled spring 19, coiled around the lower portion of the same and bearing against the lowermost lug and the sliding collar Q, working over said rod P. The said sliding collar Q is'provided with a projecting securing-arm q, projectinginto and working within the vertical slot R, formed in said upright between said rearwardly-extending lugs, said arm q being connected to the rear of the sliding rack-bar D. The tension of the spring 19 is sufficient when the upper-dog'head lever is notmeshing with the rack to sharply carry the sliding rack-bar up and the lower doghead therewith, so as to automatically throw the lower dog into engagement with the under side of the timber when it is desired to dog the same. In order to prevent the sliding collar carrying the rack-bar and the lower dog-head from striking the upper lug O, a butter-spring S is located at the upper end of the rod P to obviate this. The entire rod and spring are suitably incased in the casing T, inclosing the same. When the dog is not in use, by placing the foot upon the foot-flange F the lower dog-head can be pressed down against the tension of the spring 1; to the bottom of the upright B and held in such position by the lock-lever U, pivoted at one end to the top of the upright B and adapted to be swung over the top of the rack-bar when the lower head is in this position.

Now it will be'readily seen that by straightening the lever Z up vertically toward the top of the dog the toothed head thereof is ungeared from the rack-bar, so that by holding the lever in this position the said upper head can be dropped of its own weight onto the timber to start the upper dog therein.

J ustprevious to ungearing the upper doghead from the rack the lock-lever U is released from the top of the rack-bar D, so that at the same time that the upper dog-head is ungeared from the rack-bar and dropped the bottom dog will automatically rise and strike the timber below. By now pressing the lever down the same will gear into the rack-bar and force both dogs into the timber at the same time and with but one motion. Reverse the lever and the dogs are forced out of the timber, the same being laterally adjustable to various thicknesses. of timber be1ng sawed, as already described.

Having thus described our'invention, what we claim, and desire to secure by Letters Patent, is

an upright mounted upon the carriage and having the vertical fac'e groove or channel, of a sliding rack-bar moving in said channel and carrying a dog-head at its lower end, a dog moving in said lower head, an upper doghead sliding upon said upright and over said rack-bar, a dog moving in said upper head, means for moving said upper and lower head toward each other, and means for simultaneously adjusting said dogs, substantially as set forth. I

2. In a sawmill-dog, the combination, with the upright having a longitudinal face groove or channel, of a spring actuated rack-bar moving vertically in said channel and carrying a dog-head at its lower end, an upper dog-v head sliding over said upright above the lower doghead,laterally-movable dog mounted in both of said heads, and means for simultaneously adjusting the dogs in said heads by a single movement, substantially as set forth.

3. In a sawmill-dog, the combination, with the upright having a face channel or groove, of a spring-actuated rack-bar moving in said channel and provided at its lower end with a' head embracing the sides of the upright, a lower dog adjustably mounted in said lower head, an upper head sliding upon said up right over the rack-bar, an upper dog mounted in said upper head, a toothed operatinglever mounted at one end in said upper head and meshing with the rack-bar, and means for simultaneously adjusting the dogs in said heads, substantially as set forth.

4. In a sawmill-dog, the upright having a face groove or channel, a spring-actuated IIO rack-bar moving in said channel and carrying a dog-head at its lower end, an upper doghead sliding over said upright above the dog, simultaneously-adjustable dogs mounted in said heads, and an operating-lever pivotally mounted at one end invsaid upper head and provided with apartly-toothed circular leverhead meshing with said rack-bar, and circular guide-flanges on each side and extending back of the teeth in the head and adapted to straddle the teeth of the rack, substantially as set forth.

5. In a sawmill-dog, the combination,with the upright having a face-channel, of asliding rack-bar moving in said channel and carrying a dog-head at its lower end, an adjustable dog sliding within said head and provided with a toothed face, an upper dog-head sliding upon said upright and having a similar toothed face, an upper dog sliding in said upper head, a dog-setting shaft passing through said upper and lower heads, and operatingpinions loosely mounted upon said shaft to revolve therewith and meshing with the toothed faces of said dogs to simultaneously adjust the same, substantially as set forth.

6. In a sawmill-dog, the upright having a longitudinal face-groove, a rack-bar moving in said groove and carrying a dog-head at its lower end, said dog-head being provided with a laterally-extending bearing-lug, a bearingsleeve working in said bearing-lug, a lower dog sliding in said lower head and provided with a rear toothed face, an upper dog-head sliding upon said upright and having a laterally-extendi ng bearing-lu g, a bearing-sleeve working in said bearing-lug, an upper dog sliding in said'upper head and having a rear toothed face, a bearing-plate secured to the rear upper end of said upright, a squared setting-shaft journaled at its upper end to said bearing-plate and passing through said bearing-sleeves, and operating-pinions carried by and sliding upon said shaft and meshing with the toothed faces of said dogs to simultaneously adjust the same, substantially as set forth.

7. In a sawmill-dog, the upright, a sliding rack-bar moving in said upright and carrying a dog-head at its lower end, a lower toothed dog sliding in said do -head, an upper dog-head mounted to slide upon the upright over the lower dog-head, an upper toothed dog sliding in said upper head, a notched bearing-plate secured to the upper end of said upright, a vertical dog-setting shaft journaled at its upper end in said bearingplate and working through said dogheads, operating-pinions carried by said setting-shaft and meshing with said toothed dogs, and an operating-handle pivotally connected to the upper end of said shaft and provided with a locking-lug adapted to engage said notched bearing-plate, substantially as set forth.

8. In a sawmill-dog, the upright having a face groove or channel, a spring-actuated rack-bar moving in said face groove or channel and carrying a lower dog-head, an upper dog-head sliding over said upright, laterallyadjustable dogs sliding in said dog-heads, means for simultaneously adjusting said dogs, and a lock-lever pivoted at one end to the top of the upright and adapted to be swung over the top of the spring-actuated rack-bar to hold the same inoperative, substantially as set forth.

9. In a sawmill-dog, the upright having the face groove or channel, a rack-bar moving in said face groove or channel, a lower dog-head carried upon the lower end of said rack-bar, an upper dog-head sliding upon said upright over the lower dog-head, an operating-lever mounted in said upper dog-head and provided with a partially-toothed head meshing with and adapted to be ungeared from said rack-bar, adjustable dogs movingin said dogheads, means for simultaneously adjusting said dogs, a rod secured in rear of the upright, and a spring-actuated collar sliding upon said rod and connected to said rack-bar, substantially as set forth.

10. In a sawmill-dog, the upright having a face-channel, rearwardly-extending lugs, and a slot between said lugs, a rack-bar sliding in said channel and carrying a lower doghead, an upper dog-head sliding upon the upright, an incased rod mounted between said rearwardly-extending lugs, a sliding collar mounted upon said rod and provided with a securing-arm projecting through said slot and connected with said rack-bar, a spring mounted upon said rod between the lowerlug and said collar, and a buffer-spring located at the upper end of said rod, substantially as set forth.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.

VANBURON MARTIN. MICHAEL HANNA. Witnesses:

O. M. KISITER, C. E. MILLER. 

